Reddit reviews Infinitesimal Calculus (Dover Books on Mathematics)

I'd say check with your professor first if it's for a class. You never know if you'll be missing a section. It helps to read what has changed in the newest edition. If it's minor cleanup or the addition of a single chapter you may be able to pass with the older version. However sometimes they change exercises and you'd be missing them for homework. Talk to the professor.

You can, however, check for Indian versions of books on Ebay or other places. These are usually paperbacks and are often in English, but they come at significantly reduced cost.

Otherwise, if this is for self-learning, I'd highly suggest looking at some Dover books. They pick up older classics or popular titles, often edit/update them a little, then publish in a cheap but nice looking and portable paperback.

E.g. Dover book on Infinitesimal Calculus for 4 bucks

There are hundreds of others. Many with good reviews, 4-5 star on Amazon. The presentation can be old-timey in some cases but the math is still relevant. I'm reading a book from the 1960's on "Information Theory" from Dover where you can see how this math motivated things like the internet and cell phones. It's based on Shannon's groundbreaking work in the 40s--much of it is still used to this day. They had the author (not Shannon) update it a bit for this new publication.

Take a look at nonstandard analysis. I believe some studies in the 90s showed that students better understood these methods.

As for books, I can recommend Henle or the free book by Keisler at the high school level.

Perhaps non-standard calculus/analysis. There are some free texts here otherwise this one has good reviews.